One word: rooftop pool. That's actually two words, but still. We spent our afternoon there cooling down after visiting Bangkok in the morning.
Room is simple and small. We had a bit of insects on the counters and walls but it can be expected with the humidity.
Make sure to Google Street view oasis silom apartments and get Thai address before going because you might not find the place easily. We were right in front of it and jetlagged at 2 am and we took 20 minutes to look around and realize it's right in the street and not an alley.
Location is great with a quick access to BTS and gay bars in Silom. Next to market during the week where you'll get great food and great coffee.